linux-kernel - Re: [RFC][2/3] Account and control virtual address space allocations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1205860276.8872.20.camel@nimitz.home.sr71.net>
Date:	Tue, 18 Mar 2008 10:11:16 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	linux-mm@...ck.org, Hugh Dickins <hugh@...itas.com>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Paul Menage <menage@...gle.com>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	David Rientjes <rientjes@...gle.com>,
	Pavel Emelianov <xemul@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [RFC][2/3] Account and control virtual address space
	allocations

On Tue, 2008-03-18 at 06:44 +0530, Balbir Singh wrote: 
> > If you're going to do this, I think you need a couple of phases.  
> > 
> > 1. update the vm_(un)acct_memory() functions to take an mm
> 
> There are other problems
> 
> 1. vm_(un)acct_memory is conditionally dependent on VM_ACCOUNT. Look at
> shmem_(un)acct_size for example

Yeah, but if VM_ACCOUNT isn't set, do you really want the controller
accounting for them?  It's there for a reason. :)

The shmem_acct_size() helpers look good.  I wonder if we should be using
that kind of things more generically.

> 2. These routines are not called from all contexts that we care about (look at
> insert_special_mapping())

Could you explain why "we" care about it and why it isn't accounted for
now?

-- Dave

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/